/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package net.dreamlu.iot.mqtt.codec;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Objects;

/**
 * Payload of the {@link MqttSubAckMessage}
 */
public class MqttSubAckPayload {
	private final List<Integer> grantedQoSLevels;

	public MqttSubAckPayload(int... grantedQoSLevels) {
		Objects.requireNonNull(grantedQoSLevels, "grantedQoSLevels is null");

		List<Integer> list = new ArrayList<>(grantedQoSLevels.length);
		for (int v : grantedQoSLevels) {
			list.add(v);
		}
		this.grantedQoSLevels = Collections.unmodifiableList(list);
	}

	public MqttSubAckPayload(Iterable<Integer> grantedQoSLevels) {
		Objects.requireNonNull(grantedQoSLevels, "grantedQoSLevels is null");
		List<Integer> list = new ArrayList<>();
		for (Integer v : grantedQoSLevels) {
			if (v == null) {
				break;
			}
			list.add(v);
		}
		this.grantedQoSLevels = Collections.unmodifiableList(list);
	}

	public List<Integer> grantedQoSLevels() {
		return grantedQoSLevels;
	}

	@Override
	public String toString() {
		return "MqttSubAckPayload{" +
			"grantedQoSLevels=" + grantedQoSLevels +
			'}';
	}

}
